Part A
AD8676ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4850 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8676ARZ and AD8674AR are both precision operational amplifiers from Analog Devices, but they differ in channel count and package configuration. The AD8676ARZ is a dual-channel op amp in an 8-lead SOIC package, while the AD8674AR is a quad-channel op amp in a 14-lead SOIC package. While their core electrical performance is closely matched, the difference in channel count and footprint means the AD8674AR is not a direct drop-in replacement for the AD8676ARZ in existing dual-channel designs. Designers should verify board layout, channel requirements, and thermal considerations before substituting one for the other.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Input Offset Voltage
High match
Parts at a glance
Part B
AD8674AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8542 Stückzahl
- Package
- SOIC-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8676ARZ | AD8674AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Channel count determines how many independent signal paths can be processed in one package; a dual cannot directly replace a quad in multi-channel designs. |
| Package / Mounting Type | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Different package footprints and pin counts require PCB layout changes, so they are not drop-in replacements for each other. |
| Supply Voltage Range | ±5 V to ±18 V (10 V to 36 V total) | ±5 V to ±15 V (10 V to 30 V total) | The maximum total supply differs, so the AD8674AR cannot be operated at the higher supply voltages the AD8676ARZ supports. |
| Input Offset Voltage (max) | 50 µV | 100 µV | Lower offset voltage improves DC accuracy; the AD8676ARZ offers tighter offset performance than the AD8674AR. |
| Input Voltage Noise Density | 2.8 nV/√Hz (typ) | 2.8 nV/√Hz (typ) | Low voltage noise is critical for precision signal conditioning; both parts share similar low-noise characteristics. |
| Gain Bandwidth Product | 10 MHz (typ) | 10 MHz (typ) | GBW sets the achievable closed-loop bandwidth; matching values indicate comparable AC performance for signal processing. |
| Input Bias Current | 2 nA (typ) | 2 nA (typ) | Low bias current minimizes errors in high-impedance circuits; both parts offer similar performance here. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The AD8676ARZ supports a wider temperature range, making it suitable for harsher environments where the AD8674AR may not be rated. |
| Supply Current per Amplifier | ~2.5 mA (typ) | ~2.5 mA (typ) | Quiescent current affects power budget; similar per-amplifier current means total power scales with channel count. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8676ARZ | AD8674AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 4 |
| Slew Rate | 2.5V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 2 nA | 3 nA |
| Voltage - Input Offset | 12 µV | 20 µV |
| Supply Current | 2.7mA (x2 Channels) | 3mA (x4 Channels) |
| Current - Output / Channel | 20 mA | 20 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8676ARZ and AD8674AR?
The AD8676ARZ is a dual, precision, low-noise operational amplifier in an 8-lead SOIC package, while the AD8674AR is a quad, precision, low-noise operational amplifier in a 14-lead SOIC package. The AD8676ARZ integrates two amplifiers per package, whereas the AD8674AR integrates four amplifiers per package. Both share similar precision and low-noise characteristics but differ in channel count and package pin count.
Are the AD8676ARZ and AD8674AR pin-compatible?
No. The AD8676ARZ uses an 8-lead SOIC (R-8) package, and the AD8674AR uses a 14-lead SOIC (R-14) package. The different package sizes and pin counts mean they are not drop-in replacements for each other on the same PCB footprint.
Do the AD8676ARZ and AD8674AR have the same supply voltage range?
Both devices are specified for operation from ±5 V to ±15 V dual supplies (10 V to 30 V total). Designers should confirm the exact supply range and specifications in the respective manufacturer datasheets before finalizing a design.
How does the noise performance of the AD8676ARZ compare with the AD8674AR?
Both the AD8676ARZ and AD8674AR are precision, low-noise amplifiers from the same Analog Devices precision op amp family and share comparable voltage noise density specifications. For exact noise figures, refer to the voltage noise density and current noise density parameters in each device's official datasheet.
Can the AD8674AR be used to replace two AD8676ARZ devices in a design?
Functionally, the AD8674AR provides four amplifiers in one package, which can cover the function of two dual AD8676ARZ devices. However, this is not a direct drop-in replacement because the package, pinout, PCB footprint, and thermal layout differ. The design must be revalidated against the AD8674AR datasheet.
What are the package options for the AD8676ARZ and AD8674AR?
The AD8676ARZ is offered in an 8-lead SOIC package (R-8 suffix). The AD8674AR is offered in a 14-lead SOIC package (R-14 suffix). Both are surface-mount SOIC packages, but with different lead counts and body widths.
Are the AD8676ARZ and AD8674AR suitable for precision signal conditioning applications?
Yes. Both devices are precision operational amplifiers intended for applications requiring low offset voltage, low drift, and low noise, such as precision instrumentation, sensor signal conditioning, and active filtering. Designers should verify the specific offset voltage, drift, and bandwidth parameters in the manufacturer datasheets for their target application.